6 months ago
I'm a comic book colorist by profession and I use Photoshop, sometimes for around 12 hours at a time nearly everyday for the last 10 years. That's to say I'm very familiar with how it performs for my use case and I definitely noticed a slight performance boost upon replacing my faulty RM650X for an HX850.
That's not to say Photoshop had been running slow or anything, but zooming and panning have returned to being butter smooth like it used to be when I got my current rig.
Does a dying PSU really have any influence in how your other components - mainly CPU and GPU - perform?